/**
 * Copyright (C) 2008 aileron.cc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cc.aileron.web.cm.auth;

import static cc.aileron.wsgi.navigation.WsgiNavigation.State.Continue;
import static cc.aileron.wsgi.navigation.WsgiNavigation.State.Unauthorized;
import cc.aileron.wsgi.WsgiProcess;
import cc.aileron.wsgi.navigation.WsgiNavigation;

import com.google.inject.Inject;

/**
 * 認証処理プロバイダ
 * 
 * UserIdContainer より userId を取得して
 * 取得出来ない場合には、401ステータス
 * 
 * @author Aileron
 *
 */
public class AuthProcessProvider
{
    /**
     * id-container
     */
    @Inject
    private UserIdContainer container;
    
    /**
     * auth-process の取得
     * @param <T>
     * @return
     */
    public <T> WsgiProcess<T> get()
    {
        return new WsgiProcess<T>()
        {
            @Override
            public WsgiNavigation doProcess(T arg0) throws Exception
            {
                final Integer userId = container.getId();
                if(userId==null)
                {
                    Unauthorized.navigation();
                }
                return Continue.navigation();
            }   
        };
    }
}